scholarly journals The role of direct oral anticoagulants (DOACs) in the treatment of heparin-induced thrombocytopenia (HIT): An evidence-based literature review

2019 ◽  
Vol 45 (2) ◽  
Author(s):  
Bright Huo ◽  
Marcel Surette ◽  
Aaron Kelly
Keyword(s):  
Literature Review ◽  
Large Scale ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Cochrane Library ◽  
Primary Therapy ◽  
Onset Of Action ◽  
Heparin Induced Thrombocytopenia ◽  
Risk Of Death

Heparin-induced thrombocytopenia (HIT) poses a risk of death secondary to thrombotic complications.Treatment options are limited for patients with poor IV access, as contemporary options are restricted to parenteral agents before switching to oral vitamin k antagonists. A literature review was conducted to examine the effectiveness of direct oral anticoagulants (DOACs) in the primary treatment of HIT. High quality evidence is scarce surrounding the use of DOACs for this indication, while past reviews have not critically appraised the evidence. Additionally, the most recent study from 2017 investigating the use of DOACs for this indication has not been reported in past literature reviews.The Cochrane Library, Embase, PubMed, Google Scholar and ClinicalTrials.gov were searched to identify and critically appraise the best available evidence. Salient literature demonstrates that DOACs are effective at raising platelet count to baseline after seven days, on average.Thrombosis and major bleeding are rarely observed when DOACs are used as primary therapy. While large scale studies are needed, patients with HIT that have poor IV access may benefit from the ease of administration, rapid onset of action and lack of routine monitoring associated with DOAC therapy.

Management of the multiple phases of heparin-induced thrombocytopenia

2016 ◽  
Vol 116 (11) ◽  
pp. 835-842 ◽  
Author(s):  
Adam Cuker
Keyword(s):  
Platelet Count ◽  
Key Management ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Vena Cava ◽  
Hepatic Function ◽  
Heparin Induced Thrombocytopenia ◽  
Increased Risk ◽  
Count Recovery

SummaryThe clinical course of heparin-induced thrombocytopenia (HIT) may be separated into five sequential phases: 1. suspected HIT, 2. acute HIT, 3. subacute HIT A, 4. subacute HIT B, and 5. remote HIT. Each phase confronts the clinician with a unique set of management questions. In this review, the phases of HIT are defined and key management questions associated with each phase are discussed. Among patients with Suspected HIT, I use the 4Ts score to determine which patients have a sufficiently high probability of HIT to justify discontinuation of heparin and initiation of a non-heparin parenteral anticoagulant. An algorithm for selecting an appropriate non-heparin anticoagulant based on the patient’s clinical stability, renal and hepatic function, drug availability, and physician comfort is provided. In patients with Acute HIT, I generally avoid prophylactic platelet transfusion and inferior vena cava filter insertion because of a potential increased risk of thrombosis. I perform 4-limb screening compression ultrasonography. In patients with symptomatic thromboembolism or asymptomatic proximal deep-vein thrombosis, I treat with anticoagulation for three months. In patients without thrombosis, I discontinue anticoagulation upon platelet count recovery. I do not transition patients to an oral anticoagulant until platelet count recovery (i. e. Subacute HIT A). I increasingly choose direct oral anticoagulants over vitamin K antagonists in this setting because of their greater convenience and safety. In Subacute HIT B and Remote HIT, I use heparin for cardiovascular surgery, whereas I use bivalirudin in patients with Acute HIT and Subacute HIT A in whom surgery cannot be delayed.

scholarly journals Direct oral anticoagulants and digestive bleeding: therapeutic management and preventive measures

2017 ◽  
Vol 10 (6) ◽  
pp. 495-505 ◽  
Author(s):  
David Deutsch ◽  
Christian Boustière ◽  
Emile Ferrari ◽  
Pierre Albaladejo ◽  
Pierre-Emmanuel Morange ◽  
...  
Keyword(s):  
Renal Function ◽  
Gastrointestinal Bleeding ◽  
Preventive Measures ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Bleeding Risk ◽  
Rapid Onset ◽  
Treatment Monitoring ◽  
Onset Of Action

The use of direct oral anticoagulants (DOACs) was an important step forward in the management of atrial fibrillation and venous thromboembolism (VTE). The DOACs, anti-IIa for dabigatran and anti-Xa for rivaroxaban, apixaban and edoxaban, all have a rapid onset of action and a short half life. There is no need for routine hemostasis testing for treatment monitoring of a DOAC. Compared with vitamin K antagonists (VKAs), DOACs may increase the risk of gastrointestinal bleeding (relative risk 1.25). Withholding the DOAC treatment, evaluating the time of the last intake and estimating the patient’s renal function are the first steps in the management of gastrointestinal bleeding. For patients without impaired renal function, achieving low coagulation takes around 24 h after the last intake of a DOAC. The use of DOAC antagonists will be helpful in controlling bleeding in the most severe and urgent situations. Idarucizumab is available for clinical use for dabigatran and andexanet is currently being reviewed by drug agencies for rivaroxaban, apixaban and edoxaban. It is important to assess the bleeding risk associated with the planned procedure, and the patient’s renal function before withholding DOAC therapy for a scheduled intervention. It is mandatory to strengthen the local hemostasis strategies in DOAC-treated patients undergoing a therapeutic endoscopic procedure. Resuming or not resuming anticoagulation with a DOAC after bleeding or a risky procedure depends on the thrombotic and bleeding risk as well as the procedure involved. This discussion should always involve the cardiologist and decisions should be taken by a pluridisciplinary team.

scholarly journals Recent Advances in Anticoagulant Treatment of Immune Thrombosis: A Focus on Direct Oral Anticoagulants in Heparin-Induced Thrombocytopenia and Anti-Phospholipid Syndrome

2021 ◽  
Vol 23 (1) ◽  
pp. 93
Author(s):  
Julie Carré ◽  
Georges Jourdi ◽  
Nicolas Gendron ◽  
Dominique Helley ◽  
Pascale Gaussem ◽  
...  
Keyword(s):  
Retrospective Studies ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Current Treatment ◽  
Prothrombotic State ◽  
Heparin Induced Thrombocytopenia ◽  
Need For Treatment ◽  
Randomized Controlled ◽  
Anti Phospholipid Syndrome

For more than 10 years, direct oral anticoagulants (DOACs) have been increasingly prescribed for the prevention and treatment of thrombotic events. However, their use in immunothrombotic disorders, namely heparin-induced thrombocytopenia (HIT) and antiphospholipid syndrome (APS), is still under investigation. The prothrombotic state resulting from the autoimmune mechanism, multicellular activation, and platelet count decrease, constitutes similarities between HIT and APS. Moreover, they both share the complexity of the biological diagnosis. Current treatment of HIT firstly relies on parenteral non-heparin therapies, but DOACs have been included in American and French guidelines for a few years, providing the advantage of limiting the need for treatment monitoring. In APS, vitamin K antagonists are conversely the main treatment (+/- anti-platelet agents), and the use of DOACs is either subject to precautionary recommendations or is not recommended in severe APS. While some randomized controlled trials have been conducted regarding the use of DOACs in APS, only retrospective studies have examined HIT. In addition, vaccine-induced immune thrombotic thrombocytopenia (VITT) is now a part of immunothrombotic disorders, and guidelines have been created concerning an anticoagulant strategy in this case. This literature review aims to summarize available data on HIT, APS, and VITT treatments and define the use of DOACs in therapeutic strategies.

Safety of New Oral Anticoagulants for Patients with Chronic Kidney Disease

2019 ◽  
Vol 24 (38) ◽  
pp. 4505-4510 ◽  
Author(s):  
Krasiński Zbigniew ◽  
Stępak Hubert ◽  
Jawień Andrzej ◽  
Stanisic Michal
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Daily Practice ◽  
Rapid Onset ◽  
Onset Of Action ◽  
Reasonable Choice ◽  
Moderate Chronic Kidney Disease

In daily practice, chemical substances called “direct oral anticoagulants” or DOACs are more convenient to administer when set beside vitamin K antagonists (VKA) due to improved pharmacologic properties, fewer drug interactions and rapid onset of action. The objective of this review was to assess whether DOACs are the alternative for VKA in subjects with mild-to-moderate chronic kidney disease (CKD). An analysis of current DOAC trials and studies was performed focusing on subjects with CKD. This review concludes that although DOACS are not recommended in the course of advanced chronic kidney disease (CrCl<30mL/min) or during dialysis, DOACS are a reasonable choice for individuals with mild to moderate CKD.

Direct Oral Anticoagulant for the Treatment of VTE in Cancer Patients: A Systematic Review and Meta-analysis

2020 ◽  
pp. 106002802096003
Author(s):  
Shujie Dong ◽  
Yatong Zhang ◽  
Yan Li ◽  
Yongjun Li ◽  
Yuqing Miao ◽  
...  
Keyword(s):  
Major Bleeding ◽  
Conventional Therapy ◽  
Lower Risk ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Cochrane Library ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Risk Of Bleeding

Background: Recent clinical guidelines suggest direct oral anticoagulants (DOACs) as treatment for cancer-associated thrombosis (CAT), but the strength of such recommendations was not clear. Newly released trials add uncertainties to the benefit and risk assessment between DOACs and conventional therapy (low-molecular-weight heparin [LMWH] or vitamin K antagonists [VKAs]). Objective: To evaluate the efficacy and safety of DOACs in patients with CAT, as compared with LMWH and VKAs. Methods: PubMed, EMBASE, Cochrane Library, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov were searched. Randomized controlled trials (RCTs) that reported outcomes of DOACs for treating CAT were included. Relative risk (RR), risk difference, and 95% CIs were pooled using the Mantel-Haenszel method. Results: A total of 8 RCTs were included. DOACs significantly reduced VTE recurrence (RR = 0.59; 95% CI = 0.48-0.73) compared with conventional therapy. Results were similar in the LMWH and VKA subgroups. DOACs had a higher, though nonsignificant, risk of major bleeding compared with LMWH (RR = 1.33; 95% CI = 0.94-1.89) but lower risk of major bleeding compared with VKAs (RR = 0.60; 95% CI = 0.39-0.93). Findings were consistent across patients with active cancer and history of cancer. Conclusion and Relevance: DOACs have better efficacy to prevent recurrent VTE compared with conventional therapy. Regarding the safety profile, DOACs may carry higher risk of bleeding compared with LMWH but lower risk of bleeding compared with VKAs. Further studies are needed to inform the optimal anticoagulation approach for different types of cancers.

scholarly journals Meta-analysis comparing direct oral anticoagulants versus vitamin K antagonists in patients with left ventricular thrombus

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252549
Author(s):  
Kazuhiko Kido ◽  
Yasir Abdul Ghaffar ◽  
James C. Lee ◽  
Christopher Bianco ◽  
Mikiko Shimizu ◽  
...  
Keyword(s):  
Vitamin K ◽  
Meta Analysis ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Left Ventricular ◽  
Left Ventricular Thrombus ◽  
Cochrane Library ◽  
Small Scale ◽  
Ventricular Thrombus

Current American College of Cardiology/American Heart Association guidelines for stroke or ST-elevation myocardial infarction recommend the use of oral vitamin K antagonists (VKAs) as a first-line anticoagulant. Although several studies have compared the use of direct oral anticoagulants (DOACs) to VKAs for left ventricular thrombus (LVT) anticoagulation therapy, they are small scale and have produced conflicting results. Thus, this meta-analysis was performed to aggregate these studies to better compare the efficacy and safety of DOACs with VKAs in patients with LVT. Cochrane Library, Google Scholar, MEDLINE, and Web of Science database searches through January 10, 2021 were performed. Eight studies evaluating stroke or systemic embolism (SSE), six studies for LVT resolution, and five studies for bleeding were included. There were no statistically significant differences in SSE (OR 0.89; 95% CI 0.46, 1.71; p = 0.73; I2 = 45%) and LVT resolution (OR 1.13; 95% CI 0.75, 1.71; p = 0.56; I2 = 1%) between DOAC and VKA (reference group) therapy. DOAC use was significantly associated with lower bleeding event rates compared to VKA use (OR 0.61; 95% CI 0.40, 0.93; p = 0.02; I2 = 0%). DOACs may be feasible alternative anticoagulants to vitamin K antagonists for LV thrombus treatment. Randomized controlled trials directly comparing DOACs with VKAs are needed.

scholarly journals Initial and Long-Term Treatment of Pulmonary Embolism: Current Approach and Future Perspectives

2018 ◽  
Vol 38 (02) ◽  
pp. 75-86
Author(s):  
Walter Ageno ◽  
Marco Donadini
Keyword(s):  
Pulmonary Embolism ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Right Ventricular Dysfunction ◽  
Current Approach ◽  
Duration Of Treatment ◽  
Onset Of Action ◽  
Long Term Treatment ◽  
Risk Patients

AbstractPulmonary embolism is associated with variable risk of early mortality, ranging from less than 1% to more than 15%. Risk stratification, based on clinical variables and signs of right ventricular dysfunction, is crucial to decide the best management and treatment strategy. Home therapy may be an option for low-risk patients, whereas patients at intermediate risk need to be hospitalized and some of them, at intermediate high risk, may require more intensive monitoring to early detect signs of haemodynamic decompensation. The initial treatment is based on anticoagulants with rapid onset of action, either parenteral (heparin/fondaparinux) or oral (direct oral anticoagulants, DOACs). Thereafter, DOACs (or, if contraindicated, vitamin K antagonists) needs to be continued for at least 3 months. Beyond this period, an individual re-evaluation of the risk-to-benefit ratio of anticoagulation should be performed, based on several factors, including the type of index event, age, sex, D-dimer and residual venous obstruction. Possibly safer strategies can be offered to higher risk patients requiring extended duration of treatment, including the DOACs apixaban and rivaroxaban at reduced dose.

scholarly journals Direct Oral Anticoagulants versus Vitamin K Antagonists in epistaxis patients: a systematic review and meta-analysis

2021 ◽  
Author(s):  
Petar Stanković ◽  
Stephan Hoch ◽  
Stefan Rudhart ◽  
Danilo Obradovic ◽  
Nikolaos Dagres ◽  
...  
Keyword(s):  
Systematic Review ◽  
Vitamin K ◽  
Meta Analysis ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Direct Oral Anticoagulants ◽  
Pooled Analysis ◽  
Favourable Outcome ◽  
Cochrane Library ◽  
Recurrence Rates

Objective: Epistaxis is the most common otolaryngological emergency and up to one third of patients in treated on an inpatient basis take oral anticoagulants (OAC). Direct oral anticoagulants (DOAC), an OAC subgroup, have been on the market since 2010 and are being increasingly prescribed due to the cardiologic and hematologic guidelines that favour them over vitamin K antagonists (VKA), the older of the OAC subgroups. The present study aims to investigate which subgroup of epistaxis patients taking OACs has a more favourable outcome. Design/Setting: A systematic review and meta-analysis were performed according to the PRISMA 2020 statement using the PubMed and Cochrane Library databases. Continuous data was analysed and standardized mean difference (SMD) was calculated according to Hedges’ g. Dichotomous data was analysed and the Mantel-Haenszel method was applied to establish the odds ratio (OR). Heterogeneity was assessed according to the I2 statistics. Main Outcome/Results: A total of 8 reports covering 1390 patients were included in the final synthesis. The pooled analysis demonstrated significantly shorter hospital stays in the DOAC group (SMD= -0.22, 95% CI -0.42 to -0.02, P= .03) and a significantly higher rate of posterior bleeding in the VKA group (OR= .39, 95% CI .23 to .68, P= .001). No statistically significant differences with regard to recurrence rates, admission rates, the need for transfusion, or surgical intervention (P= .57, .12, .57 and .38 respectively) were found. Conclusion: According to this meta-analysis, epistaxis patients taking DOACs have a more favourable outcome than patients taking VKAs.

Perioperative Management of Patients Receiving New Anticoagulants

2019 ◽  
Vol 25 (19) ◽  
pp. 2149-2157 ◽  
Author(s):  
Massimo Lamperti ◽  
Andrey Khozenko ◽  
Arun Kumar
Keyword(s):  
Vitamin K ◽  
Elective Surgery ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Oral Intake ◽  
Bleeding Risk ◽  
Dietary Vitamin ◽  
Reversal Agent ◽  
Onset Of Action ◽  
Reversal Agents

There is an increased use of oral anticoagulants for the prevention of venous and arterial thrombosis. Vitamin-K antagonists have been used for decades as the main oral anticoagulants but they have the draback a complex therapeutic management, slow onset of action and by a different oral intake caused by dietary vitamin K intake. New non-vitamin K antagonist oral anticoagulants (NOACs) have been developed to overcome the limitations of warfarin. Their management is easier as it requires a fixed daily dose without coagulation monitoring. Although their therapeutic profile is safe, proper attention should be paid in case of unexpected need for the reversal of their coagulation effect and in case a patient needs to have a scheduled surgery. For non-acute cardiac surgery, discontinuation of NOACs should start at least 48 hours prior surgery. Intracranial bleedings associated with NOACs are less dangerous comparing to those warfarin-induced. NOACs need to be stopped ≥24 hours in case of elective surgery for low bleeding-risk procedures and ≥48 hours for high bleeding-risk surgery in patients with normal renal function and 72 hours in case of reduced CrCl < 80. The therapy with NOACs should be resumed from 48 to 72 hours after the procedure depending on the perceived bleeding, type of surgery and thrombotic risks. There are some available NOAC reversal agents acting within 5 to 20 minutes. In case of lack of reversal agent, adequate diuresis, renal replacement therapy and activated charcoal in case of recent ingestion should be considered.

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